Explanation:
We have,
Mass of an object is 0.5 kg
Force constant of the spring is 157 N/m
The object is released from rest when the spring is compressed 0.19 m.
(A) The force acting on the object is given by :
F = kx
(B) The force is simply given by :
F = ma
a is acceleration at that instant
It really depends on what the bulb is being used for, since efficiency means how much of the output is USEFUL.
If the bulb is being used for light in a dark room, then it produces (8.2% x 21W) = 1.72 joules per second of light energy.
If the bulb is being used to keep a hamster cage or a fish tank warm, then the 8.2% is the useful part, and the light is the other (91.8% x 21W) = 19.28 joules per second.
I would choose the vinegar before baking soda because the baking soda is what is making the chemical reaction with the vinegar. Both need eachother but the vinegar is a less powerful reactant than the baking soda.
Answer:
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- <u><em>Using thermal imaging to detect heat energy loss through the roof and windows.</em></u>
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Explanation:
<em>Heat energy</em> is transmitted by conduction, convection, and <em>radiation</em>.
All warm objects emit heat energy in the form of infrared <em>radiation</em>, which is a kind of invisible light (light with a lower frequency and longer wavelentgh than the visible light).
The amount of heat energy emitted by an object is proportional to its temperature: the higher the temperature of the object body, the greater the amount of radiant energy emitted.
A<em> house </em>can loss heat energy by radiation through the walls, <em>roof and windows.</em>
<em>A thermographic camera or thermal imaging camera </em>will detect the infrared radiation emitted through walls, roof and windows, showing a red image in those areas.
I found the image attached in internet, showing the red areas around the roof and windows of a house, mainly, using a thermal imaging camera.